feat(argo-cd): Add argocd image updater (#477)

* Add argocd-image-updater chart

Signed-off-by: Wylie Hobbs <wylie-hobbs@pluralsight.com>

* Add maintainers

Signed-off-by: Wylie Hobbs <wylie-hobbs@pluralsight.com>

* update rbac and chart metadata

Signed-off-by: Wylie Hobbs <wylie@wyliehobbs.com>

* fix chompstyle

Signed-off-by: Wylie Hobbs <wylie@wyliehobbs.com>

* add README/template with helm-docs

Signed-off-by: Wylie Hobbs <wylie@wyliehobbs.com>

* Use correct icon url and use a generic maintainer section

Signed-off-by: Marco Kilchhofer <mkilchhofer@users.noreply.github.com>

Co-authored-by: Marco Kilchhofer <mkilchhofer@users.noreply.github.com>

charts/argocd-image-updater/templates/rbac.yaml

@@ -0,0 +1,48 @@
+{{- if .Values.rbac.enabled }}
+---
+apiVersion: rbac.authorization.k8s.io/v1
+kind: Role
+metadata:
+  labels:
+    {{ include "argocd-image-updater.labels" . | nindent 4 }}
+  name: {{ include "argocd-image-updater.fullname" . }} 
+rules:
+  - apiGroups:
+      - ''
+    resources:
+      - secrets
+      - configmaps
+    verbs:
+      - get
+      - list
+      - watch
+  - apiGroups:
+      - argoproj.io
+    resources:
+      - applications
+    verbs:
+      - get
+      - list
+      - update
+      - patch
+  - apiGroups:
+      - ""
+    resources:
+      - events
+    verbs:
+      - create
+---
+apiVersion: rbac.authorization.k8s.io/v1
+kind: RoleBinding
+metadata:
+  labels:
+    {{ include "argocd-image-updater.labels" . | nindent 4 }}
+  name: {{ include "argocd-image-updater.fullname" . }}
+roleRef:
+  apiGroup: rbac.authorization.k8s.io
+  kind: Role
+  name: {{ include "argocd-image-updater.fullname" . }}
+subjects:
+- kind: ServiceAccount
+  name: {{ include "argocd-image-updater.serviceAccountName" . }}
+{{- end }}